src/unix/apptraits.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/unix/apptraits.cpp
   3 // Purpose:     implementation of wxGUIAppTraits for Unix systems
   4 // Author:      Vadim Zeitlin
   5 // Created:     2008-03-22
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwindows.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 // for compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #ifndef WX_PRECOMP
  27 #endif // WX_PRECOMP
  28
  29 #include "wx/apptrait.h"
  30 #include "wx/unix/execute.h"
  31
  32 // ============================================================================
  33 // implementation
  34 // ============================================================================
  35
  36 int wxGUIAppTraits::WaitForChild(wxExecuteData& execData)
  37 {
  38     const int flags = execData.flags;
  39     if ( !(flags & wxEXEC_SYNC) || (flags & wxEXEC_NOEVENTS) )
  40     {
  41         // async or blocking sync cases are already handled by the base class
  42         // just fine, no need to duplicate its code here
  43         return wxAppTraits::WaitForChild(execData);
  44     }
  45
  46     // here we're dealing with the case of synchronous execution when we want
  47     // to process the GUI events while waiting for the child termination
  48
  49     wxEndProcessData endProcData;
  50
  51     // we may have process for capturing the program output, but it's
  52     // not used in wxEndProcessData in the case of sync execution
  53     endProcData.process = NULL;
  54
  55     // sync execution: indicate it by negating the pid
  56     endProcData.pid = -execData.pid;
  57
  58     endProcData.tag = AddProcessCallback
  59                       (
  60                          &endProcData,
  61                          execData.GetEndProcReadFD()
  62                       );
  63
  64
  65     // prepare to wait for the child termination: show to the user that we're
  66     // busy and refuse all input unless explicitly told otherwise
  67     wxBusyCursor bc;
  68     wxWindowDisabler wd(!(flags & wxEXEC_NODISABLE));
  69
  70     // endProcData.pid will be set to 0 from wxHandleProcessTermination() when
  71     // the process terminates
  72     while ( endProcData.pid != 0 )
  73     {
  74         // don't consume 100% of the CPU while we're sitting in this
  75         // loop
  76         if ( !CheckForRedirectedIO(execData) )
  77             wxMilliSleep(1);
  78
  79         // give the toolkit a chance to call wxHandleProcessTermination() here
  80         // and also repaint the GUI and handle other accumulated events
  81         wxYield();
  82     }
  83
  84     return endProcData.exitcode;
  85 }
  86
  87